Saw-supporting device



L. SALVESEN.

SAW SUPPORTING DEVICE.

APPLICATION FILED JULY 15, 1919.

Patented Feb. 17', 1920.

I Hnvmtoz Lars Jalresw LABS SALVESEN, 0F SATSUP, "WASHINGTON.

SAXV-SUPPORTING DEVICE.

Specification of Letters Patent.

Patented Feb.17, 1920.

Application filed July 15, 1919. Serial No. 311,076.

1 b all whom it may concern Be it known that I LARS SALvEsnN, a subject of the King of Norway, residing at Satsup, in the county of Yakima and State of Washington, have invented a certain new and useful Improvement in Saw-Supporting Devices, of which the following is a specification.

7 My invention relates to improvements in devices for supporting saws that are adapted to be used for undercutting timber, as for sawing a fallen log and the object of my invention is to provide a saw support that is simple, compact and durable in construction, efiicient in operation and that is susceptible of a wide range of adjustment.

The invention consists in the novel construction, adaptation and combination of parts of a saw supporting device as will be more clearly hereinafter described and claimed.

I accomplish these objects by devices illustrated in the accompanying drawings, wherein- Figure 1 is a View in elevation on a reduced scale showing my saw supporting device as it may appear when in use on a log, the log being shown partly in cross-section;

Fig. 2 is a plan view of my invention;

Fig. 3 is a view in cross-section substantially on broken line 3, 3 of Fig. 2, certain parts being broken away; and

Fig. 4: is a fragmentary view in elevation showing parts of the saw supporting arm and toothed retaining member that is associated therewith.

Referring to the drawings, throughout which like reference numerals indicate like parts, the numeral 5 designates a shank that is flattened to a chisel edge at its forward end as at 6 and is bifurcated to form two rearwardly projecting members 7 and 8, the member 7 being longer than the member 8 and having a square end 10 that is adapted to receive the blows of a sledge or hammer by which the flattened end 6 of the shank may be driven into a log as shown in Fig. 1.

Operatively disposed between the two shank members 7 and 8 is an arm 12 that is provided with a longitudinally extending slot 13 and has its outer end bent at right angles to the body thereof to form a circular block 14 into which may be screwed a stud pin 15 that forms a bearing for a roller 16, which roller is provided with a plurality of peripheral grooves 17 in which the back of a saw 18 may operate.

20 is a rectangular plate that is provided on one side with radial teeth 21 and on the other side with two lugs 22 and 23 that are disposed on the opposite sides of a perforation 24, as shown in Fig. 4:, and are arranged to project into the slot 13 so that the arm 12 may be moved lengthwise without moving the plate 20 but can not be turned on a pivot unless the plate is turned.

25' is a rectangular plate, of substantially the same dimensions as theplate 20, that is provided with angular or beveled edges 26 and is adapted to be inserted within a suit able recess in the inner wall of the shank member 7 so that the plate is flush with the inner wall of the shank member.

The plate 25 is provided with a centrally disposed perforation 27 and is further provided around such perforation with radially arranged teeth 28 that effect a locking engagement with the teeth 21 on the plate 20.

The shank members 7 and 8 are perforated so that a bolt 30 may be passed transversely therethrough and through the plates 20 and 25, the square head of the bolt being arranged to fit within a suitable recess 31 in the outer side of the shank member 8 whereby the bolt is prevented from turning.

The threaded end of the bolt 30 is arranged to screw within a nut member 32 that is provided at its outer end with a crossin 33 by which the nut may be turned, a was or 31 preferably being interposed between the nut 32 and the side of the shank member 7.

When the nut 32 is screwed tightly against the washer 31 the arm 12 will be rigidly to adjust the saw supporting roller both vertically and horizontally in order to support' the saw in the most eflicient manner.

.7 Obviously changes may be madein the precise form of construction and arrange-' ment of parts of my invention Without debif'urcated shank having one end parting from the spirit thereof.

What I claim is:

15A saw supportlng device comprl sngg a v that 1s attened and arranged to be driven into a piece of timber, an armhaving a longitudinal 'slot, means engag'eable fwithmlsal'd slot for releasably securing said arm between the bifurcated portions of said shank in adjusted positions, and a grooved sai'v support- 111g roller journaled on the outer end oflsaid shank having a bifurcated body portion and movableilengthwise of said arm but secured against rotation Withrespect thereto, a rigid toothed section on the inner side of one of thebifurca'ted portions of said shank and arranged to engage with said toothed meniber that is movable; withln the sl'o'tin said arm, a bolt extendlng crosswlse through said shank, said-arm and said toothed members,

7 an'ut'arran ed to s'ererjv on to said boltto clamp said arm in variou s adjusted positions; and a saw "supporting roller journaled on the outer endof said arm. 3. A saw supporting device comprisin a shank having a bifurcated body and a fi attened end that may be driven into a piece of timber, the outer side of one of said bifurcated body portions being recessed for the reception of a bolt head and the inner side of the other of said bifurcated body portions being recessed at a point substantially opposite the recess for said bolt head, a longitudinallyslotted arm interposed between the ti'vosides of said bifurcated shank body, a

toothed plate removabl'y disposed Within the recess in the inner surface of oneof said bifurcated bodyportionsl, a'toothe'd member arranged to interfit said toothed plate and provided with lugs'that project'into the slot in said arm to preventsaid toothed member from turning relative to s'aid arm a bolt extending through saidsh'ank, said; toothed member andsaid toothed plate, anut on said bolt; across-pin forturning said nut,

and asa'wsupporting roller arranged with its axis at right angles to'the longitudinal axis of said arm and rotatably mounted on the outer end of said arm;

V In" Witness whereof I hereunto subscribe my this 7th day-0f J my, A. D. 191 9, 'J 'L'ARS sALvias N. 

